Remove code for unsupported django.VERSION < (3, 2)

[cclauss]

% django-upgrade --target version=5.0 **/*.py

https://github.com/adamchainz/django-upgrade/blob/main/README.rst

--

- import django

- if django.VERSION < (3, 2):
-     default_app_config = 'django_celery_beat.apps.BeatConfig'

[bukacdan]

What's the status on this? We want to move to Django 5 and we want to keep celery-beat in.

[cclauss]

Closing in favor of

• Remove code for unsupported django.VERSION < (3, 2) #729